#include <iostream>

using namespace std;

int main()
{  string s;
   cout<<"Vvedite posledovatelnost"<<endl;
   cin>>s;
   string s1;
   char a;
   for (int i=0;i<s.length();i++)
   {a=s[i];
     if ((a =='(')(a =='{')(a =='[')(a =='<')  s1=="")
            s1+=a;
     else
     {
         if  (s1!="")
     {
         if   (((a==')') && (s1[s1.length()-1]=='(')) ((a=='}') && (s1[s1.length()-1]=='{')) ((a==']') && (s1[s1.length()-1]=='[')) ||((a=='>)') && (s1[s1.length()-1]=='<')))
               s1.pop_back();

     }
    }
    }
if (s1=="")
        cout<<"TRUE";
else cout<<"FALSE";

     return 0;
}
